Calibrator

• US 20040193024A1
• Filed: 12/18/2003
• Published: 09/30/2004
• Est. Priority Date: 08/16/2001
• Status: Abandoned Application

• Current Assignee: Bernhard B. Sterling, Heidi M. Smith, James R. Braig, Jennifer H. Gable, Julian M. Cortella, Peter Rule
• Original Assignee: Bernhard B. Sterling, Heidi M. Smith, James R. Braig, Jennifer H. Gable, Julian M. Cortella, Peter Rule
• Inventors: Gable, Jennifer H., Braig, James R., Sterling, Bernhard B., Rule, Peter, Cortella, Julian M., Smith, Heidi M.
• Application Number:
  US10/739,881
• Publication Number:
  US 20040193024A1
• Time in Patent Office: Days
• US Class Current: 600/310
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/1491 Heated applicators
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes

Abstract

A method calibrates a monitor that comprises a non-invasive blood constituent monitor and a traditional measurement system. The non-invasive blood constituent monitor includes a thermal gradient inducing element an analyzer window. A traditional monitor output representing a property of a blood constituent is generated by the traditional measurement system. A non-invasive monitor output representing the property of the whole blood constituent is generated by the non-invasive constituent monitor. The traditional monitor output and the non-invasive monitor output are compared to estimate an amount of error. The non-invasive monitor output is corrected by the amount of error.

Claims

1. A method for calibrating a non-invasive blood constituent monitor connected to a traditional measurement system via a data link, the method comprising:

withdrawing an amount of whole blood from a patient;

analyzing a blood constituent in the amount of whole blood with the traditional measurement system and generating a traditional monitor output representing a property of the blood constituent;

placing a thermal gradient inducing element of the non-invasive blood constituent monitor in contact with the skin of the patient;

analyzing the blood constituent in blood within the patient by detecting thermal radiation at selected wavelengths and generating a non-invasive monitor output representing the property of the blood constituent;

comparing the traditional monitor output and the non-invasive monitor output to estimate an error; and

correcting the non-invasive monitor output based on said error.

2-31. -31. (CANCELLED)